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2. Parthenocissus Planchon in A. L. P. P. de Candolle and C. de Candolle, Monogr. Phan. 5: 447. 1887. name conserved.

[Greek parthenos, virgin, and kissos, ivy; equivalent of vigne vierge, French name for type species, P. quinquefolia] [Greek parthenos, virgin, and kissos, ivy; equivalent of vigne vierge, French name for type species, P. quinquefolia]

Psedera Necker ex Greene; Landukia Planchon

Lianas, climbing by tendrils or scrambling without support and producing adventitious roots, synoecious. Branches: bark adherent; pith white, continuous through nodes; tendrils 3–12-branched, with or without adhesive discs. Leaves usually palmately compound, sometimes simple. Inflorescences usually bisexual, leaf-opposed or terminal, paniclelike or corymblike cymes, sometimes compound. Flowers bisexual; calyx cup-shaped, shallowly 5-lobed; petals 5, distinct; nectary adnate to base of ovary, annular, entire, or absent; stamens 5; style conic, short. Berries dark blue or black. Seeds 2–4 per fruit. x = 10.

Species 15 (4 in the flora): North America, Asia.


1 Leaves usually simple, if palmately compound then leaflets 3.   1 Parthenocissus tricuspidata
+ Leaves palmately compound, leaflets (4–)5–7   (2)
       
2 (1) Leaflets thick, fleshy, (5–)7, 3–5 cm; Edwards Plateau and Lampasas Cut Plain, Texas.   2 Parthenocissus heptaphylla
+ Leaflets thin, herbaceous, (4–)5(–7), 4–12 cm; throughout North America, including Edwards Plateau and Lampasas Cut Plain   (3)
       
3 (2) Inflorescences dichotomously branched, without distinct central axes; berries 8–12 mm diam.; tendrils (2–)3–5-branched, usually without, rarely with, adhesive discs; leaflets lustrous adaxially.   3 Parthenocissus vitacea
+ Inflorescences divergently branched, with distinct central axes; berries 5–8 mm diam.; tendrils 4–12-branched, with adhesive discs; leaflets dull adaxially.   4 Parthenocissus quinquefolia

Lower Taxa


 

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Flora of China  
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